Tire.



A. W. LIVINGSTON.

TIRE.

APPLICATION FILED SEPT. 22, 1913.

Patented F9102, 1915.

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ANDREW w. nrvmesroiv, or own, cnmronm Ass'mncn'ro sunn n srnnn WHEEL AND TIRE ABMDR COMPANY, or OAKLAND, cALIrfocaNIA, a. CORPORATION,

or ARIZONA.

1,127,035, Specification of Letters l sten I Patenwd Feb. 2,1915;

Gontinuation in part of application Serial No. 747,341, filed; February 10, 1913.

' September 32,1913.

State of California. have inventedcertain new and useful Improvements in Tires, of

which the following is a specification,

This invention relates to improvements in I pneumatic tires of the puncture proof type,

the objects. of my invention being to provide a metallic armor-therefor and-means for ventilating the interior of the tire to do away with the heat of compression generated'within the inner tube.

This application is a continuation of my prior application numbered 747,341 filed February 10, 1913, and contains a modified form of the matter divided from said prior application in response to action dated March 22, 1913.

With these objects in view my inyention' consists in the novel construction of a cas- .ing as herein described and as more-particularly pointed out in the claims hereto appended.

Referring to the accompanying drawing wherein like numerals refer to the same parts in the several views, Figure 1 is a view in elevation of a portion of a tire constructed in accordance with my invention. Fig. 2 is an enlarged sectional view therethrough. Fig. 3 is a view in plan of a portion of the armor used on this tire.

My improved tire consists of the outer casing 1 which may be made in any of the regular sizes and shapes such as clencher,

demountable rim, or straight sided. This casing is provided with a plurality of trans- -verse slits 2 extending from the base to a point above the rim as shown at 3. These slits are made very narrow that While allowing egress and entrance of air, they will not permit the passage of sand, dirt or other foreign matter. The slits in opposite walls I prefer to place in staggered re.- lation and it will be understood that other forms of openings such as circular holes or circumferential slots may be used. With in this casing is placed the inner pneumatic tube 4 which is of such construction that it alone is capable of withstanding the required air pressure. The usual inflating valve 5 is provided and when under pres sure this .tube assumes a circular shape Serial l'to. 7913099.

which does notentirely .fill'the outer casing, interstices being left therebetween. In use the an in these interstices becomes heat- I This application "flied ed by conduction from the air within-tube- 4 and as the tire moves along the. ground j thiSair is constantly being compressed'and forced out, new air drawn in through the slits 2 whenever the pressure is changedior removed. On the sides of tubeare vul-" canized rounded ribs 7 which preven t the casing 1 from bending inwardly at this point and onthe other circumference of. the tube .4: 1s vulcanized a strip 8 having a flat periphery to receive the armor 9. The lat-L I have provided an improved puncture proof tire, and one having a longer lifethan the usual type on account of the lack of de-a terioration due to heat generated within the inner tube by the movement of the car.

't r is in the form .of a thin metallic gtfi Th e' cheek strips 7 may also be ,provided -j with slits l4 whichallow the passage of air from the interstices 6 to the slits 2. While? this is the'present, and preferred construction, it will be understood in practice such changes may be made in form and detail 6f construction as do not depart from the spirit of theinvention. I What I claiinfas new and ish to cover by Letters Patent is 1 A pneumatic tire comprising an outer: casing, an inner tube capable of withstand-v ing pressure and means for inflating said tube, circumferential strips on the exterior of said tube to support said casingand form interstices therebet'ween, diagonally di posed slots in said strips giving communication between said interstices and slits in the sidewalls of said casing communicating with said interstiees, allowing air to pass in and out of said interstices for the purpose.

herein set forth.

2. A pneumatic tire comprising an outer.

casing, an inner tube capable of withstand- I ing pressure and means for inflating said tube, circumferential strips on the exterior of said inner tube for the purpose of supporting said outer tube and forming interu may circnlate in and out of said interstices between said casing and said inner tube.

3. A pneumatic tire comprising an outer casing, an inner tube capable of withstanding the required pressure, a flat strip secured to the outer surface of said inner tube, a metal strip arranged outside of said flat strip, and provided with beaded edges,

blocks intermediate said metallic strip and said outer casing, and ring-like members arranged Within said beads.

In testimony whereof I afiix my signature in presence of two Witnesses. ANDREW W. LIVINGSTON. Witnesses:

R. M. OYARZO, J. M. BENHAM. 

